Plain-language answer: Amplitude modulation varies a carrier’s amplitude with the audio signal and normally transmits the carrier plus two sidebands.
Why operators care
AM can deliver natural-sounding audio but occupies more bandwidth and places different power and linearity demands on the transmitter than SSB.
How to use it well
Confirm the permitted bandwidth and power measurement, set carrier and modulation levels correctly, and monitor for distortion or splatter.
The common mistake
Applying an SSB power rating or microphone setting directly to AM operation.
Operating boundary
Predictions, reports, schedules, and mode descriptions guide a decision; they do not override current regulations, equipment limits, exact station conditions, or what the operator verifies on air.
